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Модель образования прослоев тяжелых минералов в отложениях потоков наносов

Модель образования прослоев тяжелых минералов в отложениях потоков наносов

Abstract

Трудами многих исследователей решены основные проблемы контроля металлоносности комплексных прибрежно-морских редкометально-титановых (“титан-циркониевых”) россыпей на историко-геологическом и региональном структурно-тектоническом уровне. В настоящее время актуальной задачей является разработка методик количественной оценки связи россыпной металлоносности с литодинамическими параметрами прибрежной части акватории на более детальном иерархическом уровне – ранга месторождений и россыпных тел, что требует развития методик геологического, физического, геохимического и математического описания процессов, ведущих к формированию этих объектов. Предлагаемая модель описывает образование концентраций россыпеобразующих минералов в аккумулятивных отложениях потока наносов (от россыпных тел до отдельных рудных прослоев), зависимость распределения этих концентраций от параметров, отражающих состав наносов и гидродинамические условия участка. Адекватность модели проверена на уровне приближенных лабораторных экспериментов, данных наблюдений геологических разрезов (шурфов) на основе приведенного в литературе и полученного авторами фактического материала по прибрежно-морским россыпям редкометально-титановой специализации. Дана геологическая интерпретация величин, входящих в уравнения, представлены полученные решения. Модель предлагается в качестве инструмента изучения и локального прогноза обогащенных участков прибрежно-морских и аллювиальных россыпей, а также может быть использована при совершенствовании технологий и оборудования при гравитационном обогащении полезных ископаемых.

The works of many researchers solved the basic problems relating the control of formation of complex coastal-marine rare-metal-titanium (“titanium-zirconium”) placer deposits at historical-geological and regional tectonic levels. Currently, an urgent task is the development of methods for quantitative estimation of the relationship between placer deposition and lithodynamic parameters of coastal waters at a finer hierarchical level (deposits and placer bodies). This requires the development of techniques for geological, physical, geochemical, and mathematical description of processes leading to the formation of these objects. The proposed model describes the formation of concentrations of placer-forming minerals in accumulative sediment flow deposits (from placer bodies to separate ore interlayers), and also the dependence of the distribution of these concentrations on the composition of the sediments and the hydrodynamic conditions of the area. The adequacy of the model has been verified at the level of approximate laboratory experiments and observational data from geological columns (pits) using already published and original factual material on coastal-marine rare-metal-titanium placers. A geological interpretation of the quantities entering into the equations is given; their solutions are presented. The model serves as a tool for the study and local forecasting of heavy mineral concentrations in coastal-marine and alluvial placer deposits. It also can be used for the improvement of technologies and equipment in gravity concentration of heavy minerals.

Keywords

ПРИБРЕЖНО-МОРСКИЕ РОССЫПИ, ВДОЛЬБЕРЕГОВОЙ ПОТОК НАНОСОВ, МОДЕЛИРОВАНИЕ РОССЫПЕОБРАЗОВАНИЯ, АККУМУЛЯЦИЯ НАНОСОВ, ГРАВИТАЦИОННОЕ ОБОГАЩЕНИЕ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold